How to Merge Several PDFs into One File

Sending a package of documents as one attachment, assembling a contract with its appendices, or stitching together pages scanned one at a time — in all these cases it's more convenient to merge several PDFs into a single file.

How to merge PDFs online

Open the merge PDF tool and upload two or more files — drag them into the window or add them one by one. The files will appear as a list; use the ↑ and ↓ arrows to set the order you want, since that's exactly the order the pages will appear in the final document. Click "Merge" and download the resulting PDF.

Merging happens on the server, no software to install, and the source files are deleted right after processing.

Why the order matters

When merging, pages are stacked one after another: first all the pages of the first file, then the second, and so on. So before merging, double-check the order in the list — for example, the cover page should come first, and any appendices should follow the main document.

What if the resulting file is too large

If you're merging scanned pages, the combined PDF can end up quite heavy. In that case, after merging, run it through PDF compression — this noticeably reduces the size, especially when the file contains a lot of images.

Common questions

• How many files can I merge? At least two, with no hard upper limit; the constraints are the size of each individual file (up to 25 MB) and the total upload size.
• Does quality stay the same? Yes, pages carry over exactly as they are, with no re-compression.
• Is it safe? Files are processed on the server and deleted right after merging.

Merging PDFs is a simple operation that saves time whenever documents need to be sent or stored as a single file.